CVE-2026-1088 identifies a Cross-Site Request Forgery (CSRF) vulnerability in the zero1zerouk Login Page Editor plugin for WordPress, affecting all versions up to and including 1.2. The vulnerability stems from the absence of nonce validation in the devotion_loginform_process() AJAX action, which is responsible for processing login page settings updates. Nonce tokens in WordPress serve as a security mechanism to verify that requests originate from legitimate users and not from malicious third parties. Without this validation, an attacker can craft a malicious web page or email containing a forged request that, when clicked by an authenticated site administrator, triggers unauthorized changes to the plugin’s login page configuration. This could include altering login form appearance, redirect URLs, or other settings that might facilitate phishing or credential harvesting. The attack vector requires no prior authentication but depends on successful social engineering to induce administrator interaction. The vulnerability does not directly compromise confidentiality or availability but impacts integrity by allowing unauthorized modification of site settings. The CVSS v3.1 base score is 4.3 (medium), with attack vector network, low attack complexity, no privileges required, user interaction required, and limited impact on integrity only. No patches or exploits are currently publicly available, but the vulnerability is published and should be addressed promptly. The plugin’s widespread use in WordPress sites makes this a relevant threat for organizations relying on this plugin for login page customization.

For European organizations, this vulnerability poses a risk primarily to the integrity of WordPress-based web portals that utilize the zero1zerouk Login Page Editor plugin. Unauthorized modification of login page settings could enable attackers to insert phishing elements, redirect users to malicious sites, or degrade user trust and experience. While the vulnerability does not directly expose sensitive data or cause denial of service, it can serve as a stepping stone for more sophisticated attacks such as credential theft or privilege escalation. Organizations with public-facing WordPress sites, especially those handling sensitive user data or providing critical services, may face reputational damage and potential compliance issues if exploited. The requirement for administrator interaction means that targeted social engineering campaigns could be effective, emphasizing the need for user awareness. Given the plugin’s niche but active usage, the impact is moderate but should not be underestimated in sectors like e-commerce, government portals, and educational institutions prevalent in Europe.

To mitigate CVE-2026-1088, organizations should first verify if the zero1zerouk Login Page Editor plugin is installed and update it to a patched version once available. In the absence of an official patch, administrators can implement manual nonce validation in the devotion_loginform_process() AJAX handler to ensure requests are legitimate. Restricting access to this AJAX action to authenticated users with appropriate capabilities can reduce exposure. Additionally, web application firewalls (WAFs) can be configured to detect and block suspicious CSRF attempts targeting this endpoint. Educating site administrators about the risks of clicking unsolicited links and implementing multi-factor authentication (MFA) for WordPress admin accounts can further reduce the risk of exploitation. Regular security audits and monitoring of login page changes can help detect unauthorized modifications early. Finally, consider disabling or replacing the plugin if it is not essential to reduce the attack surface.